Prospective Epidemiological Research Studies in IrAN (The PERSIAN Cohort): Rationale, Objectives and Design

ABSTRACT

Non-communicable diseases (NCDs) account for 76% of deaths in Iran and this number is on the rise, parallel to global rates. Many risk factors associated with NCDs are preventable; however it is first necessary to conduct observational studies to identify relevant risk factors, and the most appropriate approach to control them. Iran is a multi-ethnic country, therefore the Ministry of Health and Medical Education sought to launch a nationwide cohort study—the Prospective Epidemiological Research Studies in IrAN (PERSIAN)—in order to identify the most prevalent NCDs among Iranian ethnicities, and to investigate effective methods of prevention. The PERSIAN cohort consists of four population-based cohorts, the adult component, presented in this article, is a prospective cohort including 180,000 individuals aged 35-70 years, from 18 distinct areas of Iran. Upon joining, participants respond to interviewer-administered questionnaires. Blood, urine, hair and nail samples are collected and stored. To ensure consistency, centrally-purchased equipment is sent to all sites, and the same team trains all personnel. Routine visits and quality assurance/control measures are taken to ensure protocol adherence. Participants are followed for 15 years post-enrollment. The PERSIAN cohort is currently in the enrollment phase; cohort profiles will soon emerge.

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